Thousands celebrate life of slain Washington ranger

A riderless horse led by a ranger leads a procession to a memorial service for Mount Rainier National Park Ranger Margaret Anderson on Jan. 10, 2012 in Tacoma, Washington. Anderson, a 34-year-old mother of two young girls, was shot and killed after setting up a roadblock to stop a vehicle that blew through a checkpoint on the road to the park's visitor center. The driver of that vehicle shot Anderson in her car and then ran away. The body of the suspect, 24-year-old Iraq war veteran Benjamin Colton Barnes, was found in a snowy creek the next day, where he died of hypothermia and drowning.

Anderson, a 34-year-old mother of two young girls, was shot and killed Jan. 1 at Mount Rainier National Park by the driver of a car that blew through a checkpoint.

Elaine Thompson, pool via AP

National Park ranger Lauren Newman walks past a line of rangers and others lining-up to meet a procession before a memorial service for Mount Rainier National Park ranger Margaret Anderson, Jan. 10, 2012, in Tacoma, Wash.

Peter Haley, Tacoma News Tribune, pool via AP

A photograph of Margaret Anderson and mountaineering sits on the stage of the memorial for U.S. National Park ranger Margaret Anderson held in Olsen Auditorium on the Pacific Lutheran University campus in Parkland, Wash. , Tuesday, Jan. 10, 2012.

Peter Haley, Tacoma News Tribune, pool via Reuters

The casket bearing the body of U.S. National Park ranger Margaret Anderson is flanked by two park rangers in Olson Auditorium before the memorial for her held on the Pacific Lutheran University campus in Parkland, Washington, Jan. 10, 2012.